The Proterozoic era, spanning from 2.5 billion to 541 million years ago, left behind remarkable geological formations, including stunning scoria sculptures shaped by natural forces. Among the most famous Proterozoic scoria outdoor sculptures is the "Fire Wave" in Arizona's Coyote Buttes, where wind and water carved vibrant, wave-like patterns into the ancient rock. Another notable example is the "Devils Marbles" in Australia's Northern Territory, where scoria boulders balance precariously, eroded over millennia.

In South Africa, the "Valley of Desolation" features towering scoria columns formed by volcanic activity and weathering, creating a dramatic landscape. Similarly, the "Bisti Badlands" in New Mexico showcase eerie scoria hoodoos and otherworldly formations. These sculptures not only highlight the artistry of nature but also offer a glimpse into Earth's ancient past.

Proterozoic scoria sculptures remain a testament to the planet's dynamic geological history, attracting geologists, artists, and travelers alike. Their enduring beauty continues to inspire awe and curiosity.